Trestle.



E. 0. VIGKERS.

TRESTLE.

APPLICATION FILED AUG. 4, M09.

Patented Jan. 25, 1910.

Jim

EMMIT O. VICKERS, OF BUFFALO, OKLAHOMA.

TRESTLE.

Specification of Letters Patent. Patented Jan, 25, 1910,

Application filed August 4, 1909. Serial No. 511,133.

To all whom it may concern:

Be it known that I, EMMrr O. VIOKERS, a citizen of the United States, residing at Buffalo, in the county of Harper and State v of Oklahoma, have invented a new and useful Trestle, of which the following is a specification.

This invention has relation to trestles, and it consists in the novel construction and ar rangement of its parts, ashereinafter shown and described.

The obgect of the invention is to provide a collapsi 1e or knock-down trestle structure, the parts of which, when set u and assembled constitute a structure wel adapted to be used for supporting scaffolding, orfor other purposes or uses to which such devices are put.

With the above object in view the trestle comprises socketed members hingedly connected together and having shoulder portions between which a beam is adapted to be gripped. The said socketed members are adapted to receive standards which serve as legs for the trestle structure, and links are pivotally connected with sa d members at their upper ends and are provided with points at their opposite ends adapted to enter the sides of the said standards. A longitudinally extensible strut is interposed between the lower ends of the said links, and, when extended, is adapted to spread the links and force the pointed extremities thereof into the sides of the standards.

In the accompanyin drawings :Figure 1 is a side elevation o the trestle. F 1g. 2 is an end elevation of the same, with parts in section. Fig. 3 is a transverse sectional view through one of the pivoted members of the trestle. Fi 4 is a side elevation showing a portion 0% one of the pivoted members of the trestle.

In the make-up of a trestle, usually two end supports are employed, which are attached, 1n the mannerv hereinafter to be described, to the end portions of a cross-beam.

As thesaid end supports are of identical structure and arran ement, a description of one will answer for both.

Each end support consists of two members 1, which are hm edly connected to ether as at 2, and each 0% which is provide with a shoulder 3. Each of the members 1 is rovided with a socket 4, and the said soc ets are adapted to receive the upper ends of purpose of reducing the material at the outer'long side of the member and consequently having a tendency to counterbalance the inner and outer portions of the said sides of the members. Links 7 are pivotally connected at their upper ends with the inner sides of the members 1, and, at their lower ends are provided with prongs 8. One of the links 7 is provided with an eye 9, to which is ivotally attached one end of a longitudinall y extensible strut 10. strut consists of the threaded end sections 11, which are connected together by a turnbuckle 12. That link ,7 other than the one to which the strut 10 is pivotally attached is provided upon its inner side with a socket 13, adapted to receive the free end of the said strut.

From the above description it is obvious that by inserting the legs or standards 5 in the sockets of the hinged members 1; then placing the end ortions of a beam 1 1 between. the shoul ers 5 of the said hinged members; then placing the prongs 8 of the links 7 against the inner sides of the standards 5 and bridging the distance between the said links by the struts 10, by turning the turn-buckle 12, the end portions or sections of the said struts may be moved or separated, whereby the prongs 8 of the said links will be forced into the standards and the lower portions of the members 1 will be swung apart, whereby the, shoulders 3 of the said members will firmly clamp the beam 14. Thus, a colla sible orknock-down trestle structure is e1 ected, havin all of the conveniences and advantages incident to such structures.

As indicated in Fig. 2 and shown more clearly in Fig. 4, each of the members 1, adjacent its upper end and on 1ts inner :tace is provided with a pair of spaced inwardly projectin prongs which are adapted to engage the beam 14, to hold the same securely in place, these prongs being denoted by the numeral 20.

-What is claimed is 1. In a trestle a beam sulpport comprising socketed .members hinged y connected together, and adapted to receive standards,

The said nected together and adapted to receive standards, links pivotally attached to the '15 members, and a longitudinally extensible strut pivoted to one link and adapted to bear at its other end against the other link.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature 20 in the presence of two Witnesses.

EMMIT O. VIOKERS.

Witnesses W. L. LITTLE, C. E. MOMINN. 

